A 71-year-old man whose body was found in a house on Friday has been named.
Richard Percival, known locally as Dickie, died after a "blunt force trauma to the back of the head", Merseyside Police said.
His body was found in Dixon Avenue, Newton-le-Willows, by officers following "a call for concern for safety".
Police arrested a 17-year-old boy on suspicion of murder. He remains in custody for questioning.